Howard Wallace, P.I. by Casey Lyall is a 264-page hardcover published in 2016 by Sterling Children's Books. The condition is very good.
Twelve-year-old Howard Wallace lives by his rules of private investigation. He knows more than anyone how to work with what he's got: a bathrobe for a trench coat, a makeshift office behind the school equipment shed, and not much else--least of all, friends. So when a hot case of student concil blackmail lands on his desk, he's ready to take it on himself...until the new kid, Ivy Mason, convinces him to hire her as a junior partner. As they banter through stakeouts and narrow h=down their list of suspects, Howard starts to wonder if having Ivy as a sidekick-and a friend--is such a bad thing after all. Then he breaks one school rule too many, and he's forced to make a choice: lose Ivy's friendship or quit the P.I. bix forever.